Coal and rock drilling machine.



G. SEALS.

GOAL AND BOOK DRILLING MACHINE. APPLICATION FILED OOT.16. 1907.

959,079. Patented May 24, 1910.

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C. SEALS.

GOAL AND BOOK DRILLING MACHINE.

APPLIOATION FILED 00T.16. 1907.

Patented May 24, 1910.

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o e o o a M G. SEALS.

GOAL AND ROCK DRILLING MACHINE.-

APPLIQATION FILED OCTJG. 1907.

Patented May 24, 1910.

3 SHEETS-SKBET 3.

/W, i Q g CHARLES SEALS,

OF LOVILIA,

IOWA.

COAL AND ROCK DRILLING MACHINE.

T 0 all whom it may concern:

Be it known that I, CHARLES SEALS, a citizen of the United States,residing at Lovilia, in the county of Monroe, State of Iowa, haveinvented certain new and useful Improvements in Coal and Rock DrillingMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in coal and rockdrilling machines and it has more particular reference to a portablemachine of that type which includes a pivotally supported frame, athreaded drill shaft working in a threaded boxing and speed multiplyinggearing for operating the drill shaft.

In connection with a machine of the above general type, the inventionhas for its object to provide a threaded boxing made in hinged sections,constructed and assembled in a novel manner.

The invention aims as a further object to provide novel means forholding one of the elements of the gear train in non-slidable relationto the boxing.

The invention aims as a further object to provide a novel construction,combination and arrangement of parts, the details of which will appearin the course of the following description, in which reference is had tothe accompanying drawings, forming a part of this specification, likecharacters of reference designating similar parts, throughout theseveral views, whereind Figure 1 is a side elevation showing a drillingmachine constructed in accordance with the present invention. Fig. 2 isa central longitudinal sectional view thereof. Fig. 3 is a top plan viewthereof. Fig. 4 is a cross sectional view on the line 44 of Fig. 3looking in the direction of the arrow and illustrating more particularlythe boxing and the assemblage of its parts. Fig. 5 is a similar view onthe line 55 of Fig. 3 illustrating more particularly a supportingtransverse bar included in the invention.

In the accompanying drawings, the numeral 5 designates a rectangularsupporting frame including parallel side bars 6 which are constructed attheir rear ends as bearings for a transverse shaft 7 having its projecting ends squared as at 8 so that a crank handle 9 may be engaged withsaid pro- Specification of Letters Patent.

Application filed October 16, 1907.

threaded drill shaft.

Patented May 24, 1910.

Serial No. 397,724.

jecting ends on either side of the frame. The shaft 7 carries betweenthe side bars 6 and in intimate relation to one of said side bars, anenlarged pinion 10 which meshes with and drives a similar pinion 11, thelatter being free to rotate on a bar 12 having its ends passing throughthe side bars 6. The projecting ends of the bar 12 are engaged inrecesses or openings 13 in the upper ends of supporting legs 14, thelatter being connected at their lower ends by a cross piece 15 having acentral opening 16 through which is engaged a pivot bolt 17 having anenlarged head 18 bearing upon the upper face of the bar 15, the bolt 17passing through an aperture in the end of a grip bar 19 and being heldin such engagement by a nut 20. The grip bar 19 has its front end formedfor engagement in an opening in the bed of rock to be drilled into andafiords a means for supporting the machine.

The bars 6 at their front ends conjointly support a block 21, having itsupper face formed at one side thereof with a straight faced portion 22and adjacent the straight faced portion with a longitudinal threadedgroove 23. The block 21 cooperates with a member 24 to afford a boxingfor the The member 24 has its under face constructed with a straightfaced portion 25, which is adapted to lie upon the portion 22, and witha longitudinal threaded groove 26. Hinge connections 27 are provided atthe outer sides of the portions 22 and 25, whereby the member 24 may bemoved to different positions in opening or closing the boxing.

The members 21 and 24 at their rear ends and in their respective underand upper faces are provided. with transverse semi-annular registeringgrooves 28 and 29, the outer walls of which are defined by flanges 30and 81. The flanges 30 and 81 engage in a groove 32 formed in the hub ofa pinion The said hub is constructed with an annular flange 34 whichengages in the grooves 28 and 29 in their registering relation. Thepinion 83 is of annular formation and surrounds a drill shaft 35 havingon its surface threads 36 corresponding in pitch to the threads of thegrooves 28 and 26, the bar 12 being centrally depressed at 12 so as topass the shaft This bar 12, is disposed in a plane with the said drillshaft 35, and to permit this the said bar is provided with the saidcentral depression or bight 12' which latter also serves as a bearingfor the drill shaft to support it so as to prevent sagging thereof whichmight result in the jamming of the thread between the sections andmembers 21 and 24, of the -device. F or the purpose of preventingrelative rotation between the pinion 88 and the drill shaft 35, saidpinion is provided with an inwardly pointing tang 37 which engages in alongitudinal axial groove 38 cut into the surface of said drill shaft.The pinion 33 is in mesh with and driven from a bevel pinion 89, whichmay be made integral with or otherwise fixed to the pinion 11. For thepurpose of holding the member 24 upon the member 21 in the use of themachine a disengageable locking device is employed which comprises abolt 40 pivoted at its lower end by a pin 4L1, secured in lugs 42provided at one side of the block 21, the said side being recessed as at43 to permit of the pivotal movement of the lower end of the bolt 40 ineffecting an assemblage or disassemblage of the parts. The adjacent sidebar 6 likewise has a recess et l formed in its upper face, whereby thebolt 40 may be moved pivotally and outwardly from the member 24:. Thebolt 40 has its upper portion reduced and threaded and provided with alock nut 45. The upper portion of the bolt L0 is designed, when theparts are assembled, to fit into a recess 46 formed in the side of themember 24: and the said bolt is held in such position by tightening thenut 45 upon the flat lower face 47 of a recess 48 which is cut into oneside of the member 24: above the recess 46.

The operation will be readily apparent from the foregoing description.The bar 19 is engaged in the bed of rocky material to be drilled, andthe frame is set at selected angles thereto, such action being had by adjusting the frame as an entirety in a horizontal plane about the pivotbolt 17. The frame is then adjusted pivotally and in a vertical planewith relation to the legs 1st and the member 24: is clamped upon themember 21 in the manner described so that the threads of the grooves 23and 26 mesh with the threads 36 of the drill shaft. The drillingoperation is then performed by rotating the pinion 10, Which, throughthe medium of the gear wheels 11 and 39, drive the pinion 33. Thelatter, by reason of its connection with the drill shaft 35 rotates suchdrill shaft, and in such rotation said drill shaft is fed forwardly byreason of the inter-meshing engagement of its threads with the threadsof the grooves 23 and 26. It will be apparent that by rotating thepinion 10 in a reverse direction, the drill shaft 35 will be retractedfrom the rock bed after the drilling operation is completed. Theprovision of the flange 84: on the pinion 33 and of the flanges 30 and31 on the members 21 and 24:, affords a means for preventingdisplacement axially of the pinion 33 with relation to the boxing.

A drilling machine constructed in accordance with the present inventionis simple in its structural details, inexpensive to manufacture, andpractical and efficient in use. "it may be readily assembled ordisassembled by opening the boxing and removing the drill shaft andlikewise by removing the grip bar 19 from the cross bar 15.

\Vhat is claimed is:

A drill comprising a frame, hinged upper and lower sections mounted atone end of the frame, the said sections being provided with registeringthreaded grooves in their inner adjacent faces, a drill shaft having athreaded portion engaging the threads in the grooves, means locking thesections in superimposed position, a shaft disposed transversely of theframe in the plane of the drill shaft and having a bight in which slidesthe said drill shaft, a cog gear loose upon said transverse shaft andhaving a crown pinion, a beveled pinion slidably receiving the drillshaft and held connected to the section and also meshing with the crownpinion, and a driving shaft mounted in the frame and having a drivinggear meshing with the cog gear.

In testimony whereof, I affix my signature, in presence of twowitnesses.

CHARLES SEALS.

Vitnesses JERRY lViLLcoX, ZIJPHANIA'H \Vnrrn.

